I changed the tympan paper three days ago, and since then my grippers are not functioning properly.
When I press the gripper pedal the grippers go up, but when I release the pedal 3 out of 4 grippers remain up, and therefore are not gripping my paper at the feed board. Because I am printing a job, I’ve been manually pushing the grippers back down with my fingers so that they grip my paper.
What could be going on? Does the fact that one of the four grippers is actually functioning give a clue to what is wrong?
Someone suggested that perhaps the grippers need to be properly lubricated with graphite powder.
Any ideas I can try? I am not so good with press part names/technology yet, so please be as detailed as possible.